Thanks for your answers! I use Glyphs 3 for this project, I do not know how it behaves in Glyphs 2. However, adding the "Use Extension Kerning" parameter solved the problem and variable font exports without any problems now! Thank you!

Hello Tim, I am working on 1-axis variable typeface, having 4 weight masters. After applying Kern On to the project, there is a problem with exporting the font, I get a message: Problem compiling “GPOS” tableSubtable Overflow in lookup: 1 type: PairAdjustment The problem disappears when deleting the...